Spinal branching of pyramidal tract neurons in the monkey
Spinal branching of pyramidal tract neurons in the monkey
复制标题
猴子锥体束神经元的脊髓分支
作者：
Y. Shinoda;P. Zarzecki;H. Asanuma
研究了恒河猴运动皮质锥体束(PT)神经元的分支模式，从颈髓运动核团和脊髓其他区域逆行激活这些神经元。1.从颈髓运动核团激活54个神经元。其中28个是从一个节段激活的，6个(11%)是从不同节段的运动核激活的。2.颈灰质非特定区(S)有15 6个神经元被激活，其中来自多个节段。3.PT神经元直接向支配前肢远端肌肉的运动核发出轴突的分支模式表明，它们的分支比其余的PT神经元少。
SummaryThe branching pattern of individual pyramidal tract (PT) neurons of the monkey motor cortex was studied by activating these neurons antidromically from within the cervical motor nuclei and also from other regions of the spinal cord.1.Fifty-four neurons were activated from motor nuclei in the cervical cord. Twenty-eight of these were activated from one segment and six (11%) were activated from motor nuclei of different segments. The remaining 20 neurons were activated from motor nuclei and also from unspecified region(s) of the gray matter.2.Another 156 neurons were activated from unspecified region(s) of cervical gray matter which could have been motor nuclei or outside the nuclei, and 64 of these were activated from more than one segment.3.The branching patterns of PT neurons sending axons directly to motor nuclei innervating distal forelimb muscles suggested that they branch less than the rest of PT neurons.